The paper analyses the information based on registers of baptisms, marriages, and deaths of the parish of St. Nicholas Bishop in Barban for the period from 1820th to 1840th. It presents historical data about the settlement, the territorial scope of the parish and the number of the population in the censuses conducted at the beginning of the XIX. century. Parish books are a rich source of data on the population of a certain region. The paper presents data on the number of baptisms, marriages and deaths of the residents of the parish of Barban, the seasonality of conception, marriage and death rates, the number of illegitimate children, twins, abandoned children, the number and pace of delivery, the most common first and last names and nicknames, the choosing of godfathers, midwives and Baptist, the choosing of the day of the wedding, the newlyweds age, repeated marriages, places of origin of the bridegroom, witnesses at weddings, the number of deaths per year, the age and sex structure of the deceast population and the causes of death of the population of Barban. The obtained data were compared with demographic data which were obtained for other Istrian and Croatian towns. Presents data and analysis provide new insights on the population of the Barban parish at the beginning of the XIX. century.